EnrollmentConfig: Switch to default constructor and in-class initialization.

chrome/chrome_browser_chromeos.gypi

 # Copyright (c) 2012 The Chromium Authors. All rights reserved.
 #
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'variables': {
     # These files lists are shared with the GN build.
     'browser_chromeos_sources': [
         # All .cc, .h, .m, and .mm files under browser/chromeos, except for tests
@@ skipping 852 matching lines @@
         'browser/chromeos/policy/device_local_account_policy_store.cc',
         'browser/chromeos/policy/device_local_account_policy_store.h',
         'browser/chromeos/policy/device_network_configuration_updater.cc',
         'browser/chromeos/policy/device_network_configuration_updater.h',
         'browser/chromeos/policy/device_policy_decoder_chromeos.cc',
         'browser/chromeos/policy/device_policy_decoder_chromeos.h',
         'browser/chromeos/policy/device_status_collector.cc',
         'browser/chromeos/policy/device_status_collector.h',
         'browser/chromeos/policy/display_rotation_default_handler.cc',
         'browser/chromeos/policy/display_rotation_default_handler.h',
-        'browser/chromeos/policy/enrollment_config.cc',
         'browser/chromeos/policy/enrollment_config.h',
         'browser/chromeos/policy/enrollment_handler_chromeos.cc',
         'browser/chromeos/policy/enrollment_handler_chromeos.h',
         'browser/chromeos/policy/enrollment_status_chromeos.cc',
         'browser/chromeos/policy/enrollment_status_chromeos.h',
         'browser/chromeos/policy/enterprise_install_attributes.cc',
         'browser/chromeos/policy/enterprise_install_attributes.h',
         'browser/chromeos/policy/heartbeat_scheduler.cc',
         'browser/chromeos/policy/heartbeat_scheduler.h',
         'browser/chromeos/policy/login_profile_policy_provider.cc',
@@ skipping 516 matching lines @@
         'browser/chromeos/attestation/attestation_signed_data.proto',
       ],
       'variables': {
         'proto_in_dir': 'browser/chromeos/attestation',
         'proto_out_dir': 'chrome/browser/chromeos/attestation',
       },
       'includes': [ '../build/protoc.gypi' ]
     },
   ],
 }